Furnace repair in Plano, TX: why furnaces fail on the first cold night, typical repair costs for ignitors and flame sensors, and what older homes need.
The first cold front of the season reaches Plano somewhere between late October and mid-November, and every year it brings the same rush: furnaces that sat idle for seven months get switched on and don’t light. If you’re searching for furnace repair in Plano, TX, the odds are good your problem is one of a short list — and some of them you can rule out before anyone comes out.
A gas furnace in North Texas works hard for three or four months and then sits through a long, hot summer in an attic that reaches 140°F. That idle stretch is hard on it:
The furnace then gets switched on at 10 p.m. on the coldest night so far — which is exactly when you find out.
| Symptom | Likely Cause | Typical DFW Repair Range |
|---|---|---|
| Burners light, then shut off within seconds | Dirty flame sensor | $100–$250 (cleaning or replacement) |
| Clicking, no glow, no flame | Cracked hot-surface ignitor | $200–$400 |
| Inducer runs, nothing else happens | Pressure switch or blocked vent | $150–$450 |
| Heat on, but blower never starts | Blower motor or capacitor | $150–$1,200 |
| Furnace short-cycles on a high limit | Airflow restriction — often the filter | Filter swap to $350+ depending on cause |
These are typical ranges, not quotes; access, parts availability and the age of the furnace all move the number. A failed control board or gas valve on an older unit can run higher, and that’s where the repair-or-replace question starts.
Much of Plano was built in the 1980s and 1990s, and many of those homes still have their original or second-generation attic furnaces. Several things show up repeatedly in neighborhoods east of US-75 and around the older parts of west Plano:
If your furnace is in that age range, an annual inspection is the single best protection — and a working carbon monoxide detector near the bedrooms is non-negotiable.
A few things are worth confirming first: the thermostat is set to Heat and above room temperature, the filter isn’t clogged, the furnace door is fully closed (a safety switch keeps it off otherwise), and the breaker and the furnace’s service switch are on. We walk through each one in furnace not working: what to check.
Never try to bypass a safety switch, relight a pilot you can smell gas around, or keep resetting a furnace that keeps locking out. If you smell gas, leave the house and call the gas utility from outside.
For a furnace over ten years old, yes. A pre-season tune-up cleans the flame sensor and burners, tests the ignitor, checks gas pressure and the heat exchanger, and clears the condensate drain on high-efficiency units — which covers most of the first-cold-night failures above. It’s part of our HVAC maintenance visits, and it’s best done in October before the schedule fills.
We handle heating repair across Plano and Allen, with common ignitors, flame sensors and pressure switches carried on the truck. The office is open Monday through Friday 7–7 and Saturday 8–5, and emergency dispatch runs 24/7 for a no-heat call on a freezing night.
Call 214-900-2533.
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Kenny founded Absolute Comfort Mechanical after more than 20 years in the Dallas–Fort Worth HVAC trade, because he was tired of watching homeowners get sold equipment they didn't need. He still runs diagnostics himself and reviews the technical advice published on this site.
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